1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdfilter/filter_lvb.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Andreas Dilger <adilger@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_FILTER
45 #ifndef AUTOCONF_INCLUDED
46 #include <linux/config.h>
48 #include <linux/module.h>
49 #include <linux/version.h>
51 #include <libcfs/list.h>
52 #include <obd_class.h>
53 #include <lustre_dlm.h>
55 #include "filter_internal.h"
57 /* Called with res->lr_lvb_sem held */
58 static int filter_lvbo_init(struct ldlm_resource *res)
60 struct ost_lvb *lvb = NULL;
61 struct obd_device *obd;
62 struct dentry *dentry;
67 LASSERT_SEM_LOCKED(&res->lr_lvb_sem);
72 OBD_ALLOC(lvb, sizeof(*lvb));
76 res->lr_lvb_data = lvb;
77 res->lr_lvb_len = sizeof(*lvb);
79 obd = res->lr_namespace->ns_lvbp;
82 CDEBUG(D_INODE, "%s: filter_lvbo_init(o_gr="LPU64", o_id="
83 LPU64")\n", obd->obd_name, res->lr_name.name[1],
84 res->lr_name.name[0]);
86 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
87 res->lr_name.name[0]);
90 CERROR("%s: bad object "LPU64"/"LPU64": rc %d\n", obd->obd_name,
91 res->lr_name.name[0], res->lr_name.name[1], rc);
95 if (dentry->d_inode == NULL)
96 /* This is always true for test_brw */
97 GOTO(out_dentry, rc = -ENOENT);
99 inode_init_lvb(dentry->d_inode, lvb);
101 CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
102 "mtime: "LPX64", blocks: "LPX64"\n",
103 res->lr_name.name[0], lvb->lvb_size,
104 lvb->lvb_mtime, lvb->lvb_blocks);
111 OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
112 /* Don't free lvb data on lookup error */
116 /* This will be called in two ways:
118 * m != NULL : called by the DLM itself after a glimpse callback
119 * m == NULL : called by the filter after a disk write
121 * If 'increase_only' is true, don't allow values to move backwards.
123 static int filter_lvbo_update(struct ldlm_resource *res,
124 struct ptlrpc_request *r,
125 int buf_idx, int increase_only)
129 struct obd_device *obd;
130 struct dentry *dentry;
135 down(&res->lr_lvb_sem);
136 lvb = res->lr_lvb_data;
138 CERROR("No lvb when running lvbo_update!\n");
142 /* Update the LVB from the network message */
146 /* XXX update always from reply buffer */
147 new = lustre_swab_repbuf(r, buf_idx, sizeof(*new),
148 lustre_swab_ost_lvb);
151 CERROR("lustre_swab_buf failed\n");
154 if (new->lvb_size > lvb->lvb_size || !increase_only) {
155 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
156 LPU64" -> "LPU64"\n", res->lr_name.name[0],
157 lvb->lvb_size, new->lvb_size);
158 lvb->lvb_size = new->lvb_size;
160 if (new->lvb_mtime > lvb->lvb_mtime || !increase_only) {
161 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
162 LPU64" -> "LPU64"\n", res->lr_name.name[0],
163 lvb->lvb_mtime, new->lvb_mtime);
164 lvb->lvb_mtime = new->lvb_mtime;
166 if (new->lvb_atime > lvb->lvb_atime || !increase_only) {
167 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
168 LPU64" -> "LPU64"\n", res->lr_name.name[0],
169 lvb->lvb_atime, new->lvb_atime);
170 lvb->lvb_atime = new->lvb_atime;
172 if (new->lvb_ctime > lvb->lvb_ctime || !increase_only) {
173 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
174 LPU64" -> "LPU64"\n", res->lr_name.name[0],
175 lvb->lvb_ctime, new->lvb_ctime);
176 lvb->lvb_ctime = new->lvb_ctime;
181 /* Update the LVB from the disk inode */
182 obd = res->lr_namespace->ns_lvbp;
185 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
186 res->lr_name.name[0]);
188 GOTO(out, rc = PTR_ERR(dentry));
190 if (dentry->d_inode == NULL)
191 GOTO(out_dentry, rc = -ENOENT);
193 if (i_size_read(dentry->d_inode) > lvb->lvb_size || !increase_only) {
194 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size from disk: "
195 LPU64" -> %llu\n", res->lr_name.name[0],
196 lvb->lvb_size, i_size_read(dentry->d_inode));
197 lvb->lvb_size = i_size_read(dentry->d_inode);
200 if (LTIME_S(dentry->d_inode->i_mtime) >lvb->lvb_mtime|| !increase_only){
201 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
202 LPU64" -> %lu\n", res->lr_name.name[0],
203 lvb->lvb_mtime, LTIME_S(dentry->d_inode->i_mtime));
204 lvb->lvb_mtime = LTIME_S(dentry->d_inode->i_mtime);
206 if (LTIME_S(dentry->d_inode->i_atime) >lvb->lvb_atime|| !increase_only){
207 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
208 LPU64" -> %lu\n", res->lr_name.name[0],
209 lvb->lvb_atime, LTIME_S(dentry->d_inode->i_atime));
210 lvb->lvb_atime = LTIME_S(dentry->d_inode->i_atime);
212 if (LTIME_S(dentry->d_inode->i_ctime) >lvb->lvb_ctime|| !increase_only){
213 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
214 LPU64" -> %lu\n", res->lr_name.name[0],
215 lvb->lvb_ctime, LTIME_S(dentry->d_inode->i_ctime));
216 lvb->lvb_ctime = LTIME_S(dentry->d_inode->i_ctime);
218 if (lvb->lvb_blocks != dentry->d_inode->i_blocks) {
219 CDEBUG(D_DLMTRACE,"res: "LPU64" updating lvb blocks from disk: "
220 LPU64" -> %llu\n", res->lr_name.name[0],
221 lvb->lvb_blocks, (unsigned long long)dentry->d_inode->i_blocks);
222 lvb->lvb_blocks = dentry->d_inode->i_blocks;
229 up(&res->lr_lvb_sem);
233 struct ldlm_valblock_ops filter_lvbo = {
234 lvbo_init: filter_lvbo_init,
235 lvbo_update: filter_lvbo_update